{"instruction": "You are an expert in named entity recognition. Please extract entities that match the schema definition from the input. Return an empty list if the entity type does not exist. Please respond in the format of a JSON string.", "schema": ["Disease", "Chemical"], "input": "Sixty - nine percent of patients continued treatment with amiodarone and had no recurrence of symptomatic VT or ventricular fibrillation ( VF ) over a follow - up of 6 to 52 months ( mean + / - standard deviation 14 . 2 + / - 8 . 2 ) ."}
{"Disease": ["VT", "ventricular fibrillation", "VF"], "Chemical": ["amiodarone"]}